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16 ASUS P2B-F User’s Manual
III. HARDWARE SETUP
Jumpers
III. H/W SETUP
CPU Core:BUS Frequency Multiple
P2B-F CPU Settings
CPU External Clock (BUS) Frequency Selection
R
BF1
BF2
BF0
BF3
2.5x (5/2)
2
1
3
BF1
BF2
BF0
BF3
3.0x (3/1)
2
1
3
BF1
BF2
BF0
BF3
3.5x (7/2)
2
1
3
BF1
BF2
BF0
BF3
4.0x (4/1)
2
1
3
BF3
BF1
BF2
BF0
4.5x (9/2)
2
1
3
2
1
3
BF1
BF2
BF0
BF3
5.5x (11/2)
2
1
3
BF1
BF2
BF0
BF3
2.0x (2/1)
6.0x (6/1)
2
1
3
BF1
BF2
BF0
BF3
6.5x (13/2)
2
1
3
BF1
BF2
BF0
BF3
7.0x (7/1)
2
1
3
BF1
BF2
BF0
BF3
7.5x (15/2)
2
1
3
BF1
BF2
BF0
BF3
BF1
BF2
BF0
BF3
5.0x (5/1)
8.0x (8/1)
BF1
BF2
BF0
BF3
133MHz
44.33MHz
FS2
FS1
FS3
1
2
3
FS0
124MHz
41.33MHz
FS2
FS1
FS3
1
2
3
FS0
115MHz
38.33MHz
FS2
FS1
FS3
1
2
3
FS0
124MHz
31MHz
FS2
FS1
FS3
1
2
3
FS0
1
2
3
133MHz
33.3MHz
FS2
FS1
FS3
FS0
140MHz
35MHz
FS2
FS1
FS3
1
2
3
FS0
150MHz
37.5MHz
FS2
FS1
FS3
1
2
3
FS0
120MHz
40MHz
FS2
FS1
FS3
1
2
3
FS0
66.8MHz
33.4MHz
FS2
FS1
FS3
1
2
3
FS0
75.0MHz
37.5MHz
FS2
FS1
FS3
1
2
3
FS0
83.3MHz
41.65MHz
FS2
FS1
FS3
1
2
3
FS0
100.3MHz
33.43MHz
FS2
FS1
FS3
1
2
3
FS0
103MHz
34.33MHz
FS2
FS1
FS3
1
2
3
FS0
1
2
3
112MHz
37.33MHz
FS2
FS1
FS3
FS0
110MHz
36.67MHz
FS2
FS1
FS3
1
2
3
FS0
1
2
3
105MHz
35MHz
FS2
FS1
FS3
FS0
CPU
PCI
CPU
PCI
3. CPU Bus Frequency Selection (FS0, FS1, FS2, FS3)
This option tells the clock generator what frequency to send to the CPU, DRAM, and
440BX AGPset. This allows the selection of the CPU’s External frequency (or BUS
Clock). The BUS Clock multiplied by the BUS Ratio equals the CPU’s Internal fre-
quency (the advertised CPU speed).
4. CPU Core:BUS Frequency Multiple (BF0, BF1, BF2, BF3)
This option sets the frequency multiple between the Internal frequency of the
CPU and the CPU’s External frequency. These must be set in conjunction with the
CPU Bus Frequency.
NOTE: Overclocking your processor is not recommended. It may result in a slower
speed. Voltage Regulator Output Selection (VID) is not needed for the Pentium III /
II / Celeron processor because it sends VID signals directly to the onboard power
controller.
Set the jumpers by the Internal speed of your processor as follows:
(CPU BUS Freq.) (Freq. Multiple)
Intel CPU Model Freq. Ratio BUS F. FS3 FS2 FS1 FS0 BF3 BF2 BF1 BF0 AGP
Pentium III 550MHz 5.5x 100MHz [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [1-2]
Pentium III 500MHz 5.0x 100MHz [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [1-2]
Pentium III/II 450MHz 4.5x 100MHz [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [1-2]
Pentium II/Celeron 400MHz 4.0x 100MHz [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [1-2]
Pentium II 350MHz 3.5x 100MHz [2-3] [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [1-2]
Celeron 466MHz 7.0x 66MHz [2-3] [2-3] [1-2] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3]
Celeron 433MHz 6.5x 66MHz [2-3] [2-3] [1-2] [1-2] [1-2] [2-3] [2-3] [1-2] [2-3]
Celeron 366MHz 5.5x 66MHz [2-3] [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] [1-2] [2-3]
Pentium II/Celeron 333MHz 5.0x 66MHz [2-3] [2-3] [1-2] [1-2] [2-3] [1-2] [1-2] [2-3] [2-3]
Pentium II/Celeron 300MHz 4.5x 66MHz [2-3] [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [1-2] [2-3]
Pentium II/Celeron 266MHz 4.0x 66MHz [2-3] [2-3] [1-2] [1-2] [2-3] [1-2] [2-3] [2-3] [2-3]
Pentium II 233MHz 3.5x 66MHz [2-3] [2-3] [1-2] [1-2] [2-3] [2-3] [1-2] [1-2] [2-3]
WARNING! Frequencies above 100MHz exceed the specifications for the onboard
Intel Chipset and are not guaranteed to be stable.